620437440 has 224 divisors, whose sum is σ = 2384169984. Its totient is φ = 133447680.

The previous prime is 620437429. The next prime is 620437549. The reversal of 620437440 is 44734026.

It is a tau number, because it is divible by the number of its divisors (224).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 620437398 and 620437407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 111525 + ... + 116955.

It is an arithmetic number, because the mean of its divisors is an integer number (10643616).

Almost surely, 2^620437440 is an apocalyptic number.

620437440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 620437440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1192084992).

620437440 is an abundant number, since it is smaller than the sum of its proper divisors (1763732544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

620437440 is a wasteful number, since it uses less digits than its factorization.

620437440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5475 (or 5465 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 30.

The square root of 620437440 is about 24908.5816537193. The cubic root of 620437440 is about 852.9023919992.

The spelling of 620437440 in words is "six hundred twenty million, four hundred thirty-seven thousand, four hundred forty".